The pretreatment consultation serves two purposes: it gives you a chance to ask your technician any questions, and allows them to explain the lamination process to you. Also, just like getting your hair dyed at the hair salon, you may require a patch test 48 hours prior to having brow lamination done, to make sure you won't adversely react to the treatment. Lash Perfect Beauty Bar explained that a patch test is only required if you plan to also have an eyebrow tint, in addition to lamination, but if you have sensitive skin, you may require a patch test prior to having brow lamination, regardless of whether you have the tint or not.
This photo shows the state of my brows prelamination. Decent shape and thickness, but also slightly unruly, and a bit droopy. That's what I wanted to change.
Image Source: POPSUGAR Photography / Ange Law